Amides acylated with acylating agents containing a water solubilizing group



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1937, Serial No. 113,528. Divided and flab 11 November 8,

plication November I, 1839. ,BeriaiNo. 3.3.323. IllSwltmerlnnd November 11, 1'36 5 (Cl. ace-20s) This application is a division of our applicatlon Serial No. 173,528 filed in U. S.,A. on November 8, 1937, and in'Switnerland on November 11, 1936, now Patent No. 18, 1941.

This invention relates to the manufacture of new condensation products by treating amides 2,235,480, issued Marchoperation should be conducted in the presence of pyridine. Dimethylaniline mayalso be used.

By the process of condensation sparingly soluble to insoluble parent materials may be confrom primary amines and carboxylic acids which contain no hydroxyl groups, with an acylating anhydrides of at least dibasic aliphatic, hydroaromatic or aromatic acids which contain suitoroups or carboxyl groups or both, or halides or anhydrides of acids which contain alkylamino groups besides the acid residues, so that after acylation the acyl residue still contains groups which can be converted into alkali metal comounds or quaternary ammonium compounds. The acylation is conducted in presence of a tertiary base, for instance pyridine. Acylating agents may therefore be used of which the non-acylating substituent enters into reaction with the tertiary base and thereby enhances the solubility of the parent material. As examples of the acylating agents defined in this paragraph there m y be named halides of .sulfo-carboxylic acids in which both the sulfo-group and the carboxyl group is in the form of a halide; also those in which only the sulfo-group or the carboxyl gr up is present in the form or halide such as the halide oi. sulfo-benzoic acids, of sulio-naphthoic acids, of sulfoacetic acid or the like: also the 4- dialkylamino-l-benzoyl halides, the 4-halogenalkyl-l-benzoyl halides and the like (com are in this respect the statements in Patents No. 2,120,741 and No. 2,170,262).

The acylationprocess may be conducted for example by heating the parent material with the acylating agent in presence of a tertiary base.

It is especially recommended, however, that the in a flber or an artificial mass.

verted into products which are more easily soluble. These soluble or freely soluble compounds may then be used as such or be regenerated to the insoluble to sparingly soluble parent material by treatment with a saponifying agent, for instance dilute caustic alkali or dilute acid. The regenerated material may in this manner be flxed fast upon or in a. substratum, for example on or In this manner various eflects such as matting or coloring may be produced.

When aliphatic bodies are selected for the condensation, for example an amide of a iatty acid of high molecular weight, such as stearic acid, and an aliphatic primary amine, for instance monoethylamine, there are obtained according to the choice oi the acylating agent assistants having cation activity or anion activity. Products having a similar action are further obtained if aliphatic-aromatic or aliphatic-heterocyclic or aliphatic-cyclo-aliphatic products, such as the amides from higher fatty acids, for example oleic acid or cocoanut oil fatty acid and aniline or cyclohexylamine, are subjected to the new reaction.

Especially valuable, however, as parent materials are carboxylic acid amides which have at the same time a more or less strongly pronounced dyestufl character, especially dyestuii's which are sparingly soluble or insoluble. These dyestuffs may belong to various series, for example the azo-dyestufl series or the vat dyestufi series, for instance the anthraquinone series. They may, however, belong to other series, for example those of the nitro-, azineor thiazine dyestutls. Such dyestufi's may be also metallic compounds; thus I as compounds which contain no hydroxyl groups there may also be considered compounds which contain masked hydroxyl groups, as is the case, for example, in the chromium compounds of the mordant dyestuffs. Among such dyestufis those are of especial value which are of such a composition that they or their soluble derivatives have an afllnity for vegetable fibers.

The condensation products obtainable from parent materials having dyestuil? characteristics and capable of reversion by action oi! a saponii'ying agent, for instance an alkali, to the sparingly soluble dyestuilf may be used, for example, for producing fast dyeings by the process of U. S. Patent No. 2,095,600. If the acyl residue which lends solubility is suiliciently stable towards saponii'ying agents, insoluble dyestuffs may be converted into those which may be used by the methods usual for dyeing' with' water-soluble The-new process consists therefore in causing -acylating agents containing besides the group effecting the acylation at least one group which reacts with the tertiary amine with formation of salts, to act in the presence of a tertiary base on the above defined amides which are free from hydroxyl groups. The products thus obtained are therefore again acid amide-like derivatives of the general formula Rr-3- i i.

in which formula :1: represents one of the two atomic groupings C=N- or CN/ I;

R1 being then united to the carbon atom, R2

to the nitrogen atom and R3 to the remaining valency, and in which R1 stands for the organic radical representing the carboxylic acid radical of the parent amide, N-'-R2 stands for the divalent radical of an amine and R3 represents an acyl radical containing at least one salt forming group selected from the group consisting of carboxyl groups, sulfonic groups and quaternary ammonium groups. They may be used for improving or dyeing various materials, for example vegetable and animal fibers, such as wool, silk, leather or artificial fibers, for instance fibers from regenerated cellulose or cellulose derivatives, and natural or artificial masses.

A preferred method of working of the new process consists in treating amides, said amides being dyestufis of the azo or anthraquinone series which contain neither hydroxyl groups nor carboxyl groups or sulfonic groups, in the presence of pyridine with halides of mono-nuclear aromatic acids which contain simultaneously one carboxyl group besides one or two sulionic groups. The products thus obtained are therefore also acid amide-like derivatives of the general formula in which R1 stands for the organic radical representing the carboxylic acid radical of the parent amide, the

grouping, which is contained in the symbol .'l2-R2,

when treated with mild saponifying agents, re-

generate the parent carboxylic acid amide, said carboxylic acid amide being also an azo-dyestuff or an anthraquinone dyestufl free from hydroxyl groups, carboxyl groups and sulfonic groups.

The following examples illustrate the invention without however limiting the same, the parts being by weight:

Example 1 3 parts of stearoylmethylamide, 4.4 parts of benzoic acid S-sulfochloride and 30 parts of pyridine are heated together for one hour at 8090 "parts of water and then neutralized with dilute sodium carbonate solution, and theproduct of re actionis salted out with sodium chloride; It is filtered and dried. The nearly white product obtained in this manner in solid form dissolves in water to a colorless clear solution with formation of a strong foam. It corresponds in the free state,

probably to the formulae 0 0m L g H o on! By mixing the solution with aqueous alkali the product is split with separation of the insoluble parent material.

A like product is obtained by substituting lauroyl anilide or the lauroylcyclohexylamide for the stearoylmethylamide.

In like manner benzoic acid ethylamide may be converted into a soluble derivative.

Finally, there may be substituted for the benzoic acid metasulfochloride another acylating agent of the kind hereinbefore defined, for instance. sulfosalicylic acid chloride, benzoic acid- 3:5-disulfochloride, sulfochloracetic acid chloride,

l :3 :-6-naphthalene-trisulfochloride, benzene hexacarboxylic acid chloride, naphthoic acid disulfochloride, furane-a:a'-sulfocarboxylic acid chlo-;

ride and the like.

Example 2 1.65 parts of benzoylaminoazotoluene, 2.3 parts of benzoic acid 3:5-disulfochloride and 30 parts of pyridine are heated together for 3 hours at 110-115" 0., whereby the insoluble parent material becomes soluble in water. The pyridine is distilled as far as possible in a vacuum. The residue is taken up with 100 parts of methyl alcohol, the solution is filtered from a little insoluble substance and the filtrate is evaporated. There is thus obtained a dark viscid product corresponding in the free state, probably to one of the two formulas SOaH , 00 0113 CH: I Q

03H N=N N-oo and o=o on; on: Q

| so=n N=N N--C which dissolves clearly in cold water. When the aqueous solution is heated and dilute sodium carbonate solution is added thereto there is a rapid decomposition, the decomposition product proving to be benzoylaminoazotoluene (melting point 178 0.).

Similar properties are possessed by the condensation products which are obtained with the O 0-;ON=EC In A 00 1 a meme the mammainsteadofpyridinefliesemaybeusedwholly orinpartanothertertiaryamine,fcrinstanc.e

Example 8 r 133 partaof z-aeetylaminoanthraquincne are stirredwithimpartsofpurilriine. Intothemix-- 'tureareatrewnliparisofbmaoicacidmetadisulfochlorideandthetemperatureisallowedto riaeioaboutlo'c. Assoonasasampieoithe condensation mixture dissolves in m the pyridine'is distilledin a vacuum at as low atempcratareaspossible. V Theaolldresiduewhieh eorrespondsprobabli totheformula CO N-COCHI to CO Example 4 6 parts of the condensation product from 1 mol cyanuric chloride with 2 mols 2-aminoanthraquinone and 1 mol aniline are heated for 3 hours at 100-110 C. with 9.6 parts of parachloromethylbenzoyl chloride in 60 parts of pyridine after which time a sample of the mass dissolves clearly in water. The pyridine is then distilled in a vacuum and the product of the reaction isolated by the procedure described in Example 6. It dissolves in water to a yellow solution from which the insoluble parent pigment is precipitated on addition of dilute alkali.

The procedure is similar with the parent materials of the preceding examples, for instance by using in this reaction stearoylmethylamide there is obtained a product of the probable formula solves to a strongly foaming solution. The solutions are saponified easily by heating them with m utom'nthismuminwmtouie parent materials in fcrmoftheirsaitsareaolubleinwater. Whatweclaimis:

1. Theacidamide-like derivatives correspondingtothegmeralformula atomic groupings -c=N-mu-c -u R1 being united to the carbon atom, R: to the nitrogen atom and R: to the remaining valency, and in which formula R1 stands for. the organic a radical of the carboxylic acid residue of the parent amide,

stands forthe divalent radical'ofan amine, said amine being an amino-dyestull', and R: stands for an acyl residue containing at least one salt forming group in the form of a salt selected from the group consisting of carboxyl groups,'sulfonic groups and quaternary ammonium groups, which products are water-soluble powders which, when treated with mild saponlfying agents, regenerate the parent acid amide free from hydroxyl, sulfonic and car-bowl groups corresponding to the 3 atom grouping R1m-R=.

ing to the general formula 40 in which formula :1: stands for one of the two atomic groupings -C=N and -G-N\ o R1 being united to the carbon atom, R: to the nitrogen atom and R: to the remaining valency, and in which formula R1 stands for the organic radical of the carboxylic acid residue of the parent amide,

stands for the divalent radical of an amine, said amine being an amino-dyestuif, and Rs stands for an acyl residue containing at least one sulfonic acid group in the form of a salt, which products are water-soluble powders which, when treated with mild saponifying agents, regenerate the parent acid amide, said amide being the dyestuif free from hydroxyl, sulfonic and carboxyl groups corresponding to the atom grouping R10JRr.

-3. The acid amide-like derivatives corresponding to the general formula in which formula :0: stands for one of the two atomic groupings C=Nand -CN/ V R1 being united to the carbon atom, R2 to the nitrogen atom and R: to the remaining valency, 16 and in which formula R1 stands for the organic in which formula 1: stands for onecf'the two 2. The acid amide-like derivatives correspondradical of the carboxylic acid residue of the parent amide,

stands for the divalent radical of an amine, said amine being an amino-dyestufl, and R3 stands for a mononuclear aroyl residue containing at least one sulfonic acid group in the form of a salt, which products are water-soluble powders which, when treated with mild saponifying agents, regenerate the parent acid amide, said amide being the dyestufi free from hydroxyl, sul-.

ionic and carboxyl groups corresponding to the atom grouping R1x-Rz. v

4. The acid amide-like derivatives corresponding to the general formula RI j in which formula a: stands for one of the two atomic groupings R1 being united to the carbon atom, R2 to the nitrogen atom and R3 to the remaining valency, and in which formula R1 stands for the organic radical of the carboxylic acid residue. of the parent amide,

stands for the divalent radical of an amine, said amine being an amino-'azo-dyestufi, and R3 stands for a mononuclear aroyl residue contain ing at least one sulfonic acid group in the form of a salt. which products are water-soluble powders which, when treated with mild saponitying agents, regenerate the parent acid amide, said amide being the dyestufl free from hydroxyl,

sulfonic and carboxyl groups corresponding to the atom grouping-Ri--xRz.

5. The acid amide-like derivatives corresponding to the general formula in which formula .1: stands for one of the two atomic groupings R1 being united to the carbon atom, Rz-to the nitrogen atom and R3 to the remaining valency, and in which formula R1 stands for the organic radical of the carboxylic acid. residue of the parent amide, 

